Transcription of Solved Electricity numerical for class 10
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Solved Electricity numerical for class 10
Page 1 Solved Electricity numerical for class 10 1. Question: Two bulbs have ratings 100 W, 220 V and 60 W, 220 V respectively. Which one has a greater resistance? Answer: P=VI= V2/R For the same V, R is inversely proportional to P. Therefore, the bulb 60 W, 220 V has a greater resistance. 2. Question: A torch bulb has a resistance of 1 when cold. It draws a current of A from a source of 2 V and glows. Calculate (i) the resistance of the bulb when glowing and (ii) explain the reason for the difference in resistance.
If 4 x 10 -3 J of work is done in moving a particles carrying a charge of 16 x 10 - 6 C from infinity to point P .What ... Resistance connected in series with lamp = r. ... if the resistance of the bulb filament is 1200 Ω? (b) How much current will an electric heater coil draw from a 220 V source, if the resistance of the heater coil is 100 ...
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